"The poor old electoral commission has these gigantic pre-poll centres to try and count on the night, and they have to use extra staff who haven't been working on polling places on the day," ABC chief elections analyst Antony Green said.

"On Saturday night, if it is a close contest, yes, it will delay the results."

Green's still expecting to predict the outcome on Saturday night "unless it is very close", but the so-called psychic croc from the NT clearly doesn't have time to wait, on Wednesday predicting Mr Shorten would be the victor in a far from scientific test.

How good his predictions are will again be tested with just three days of the election campaign to go.